You've got a bundle of ailments, but I see you speak of two computers.
(1) Try uninstalling the bundle of updates that just came in, as I posted on page 7.
(2) Are you saying neither computer will reinstall when you click "Update Now" at...
https://www.microsoft.com/en-us/software-download/windows10
Download Windows 10 -- Always the latest released version, currently 1909
That would constitute an over-install of 1909 keeping all files, settings & apps. But - as you've got such instability - definitely ensure you backup important files & downloads to external media first. Also, it might be best to make a USB Installation drive with which to do the over-install. If it fails, you'll be able to try a clean install with it, instead.